Commitments and Contingencies - Guarantees (Details) - Financial Guarantee - USD ($) $ in Thousands	May 01, 2020	Mar. 31, 2020
Commitments and Contingencies
Guarantor obligations, maximum exposure (up to)		$ 56,734
The Residences at Annapolis Junction
Commitments and Contingencies
Guarantor obligations, maximum exposure (up to)		8,300
Delray Plaza
Commitments and Contingencies
Guarantor obligations, maximum exposure (up to)		5,180
Nexton Square
Commitments and Contingencies
Guarantor obligations, maximum exposure (up to)		12,600
Interlock Commercial
Commitments and Contingencies
Guarantor obligations, maximum exposure (up to)		$ 30,654
Subsequent Event | Interlock Commercial
Commitments and Contingencies
Guarantor obligations, maximum exposure (up to)	$ 34,300